Sterlingtek.com for ALL your battery needs. No joke. If you're gonna get aftermarket batteries this is the place. I know many professionals who buy them from here as well as us amatuers and semi-pro's.

I have been using a Power2000 in rotation with a Canon OEM for two years with no issues. Without record keeping it seems to be the equal of the Canon unit. From what I have read LI batteries are good for three years or 300 charge cycles so the real concern is to get fresh inventory when you purchase a battery. I would not want to send my money on a battery that has been on a shelf for two years prior to my purchase. Buying from a place with a high turnover seems to be the safest policy.

I've tried to use two different replacement Power2000 Fuji NP-150 batteries but have no luck with either, whether charged in my Fuji BC-150 or the accompanying ac/dc charger with the Power2000 replacements. The first power200 and it's charger were both dead even though they tested at 7.4v when charged in my Fuji BC-150, but nothing in its own charger. That one was replaced with another whole kit with the new Power2000 battery showing some promise until I tried to use it in my Fuji FinePix S5 Pro where it displayed with only one blinking battery charged indicator and let me fire off only one frame. I have discharged and recharged each battery several times with no luck at getting anything more than a single shot before all goes dead. I finally bought a real Fuji NP-150 while on a shoot in Moosenno, Ontario (I'm from Florida) and after a single charge it performed as it should.

Two bad Power2000 batts in a row makes me stear away from that brand and stick with the more expensive Fuji NP-150. I've found my Sony HD Z1U video cameras perform much better and longer with their Sony batts than the two long-life Power2000's I bought for them.

Nevermore with anything by Power2000; the aggrevation and time wasted is not worth the discount.

I've used them in my Rebel / XT / XTi since 2003 with very good results. My subjective impression is that these batteries are 90-100% as good as the original Canon batteries, at 25% of the cost.

Prices and service from BatteryBarn are outstanding. (About $12.45 for an NB-2LH or BP-511 replacement, and free shipping possible with orders of several batteries.) Normal USPS shipping is very fast.

I once had a bad battery (NB-2LH replacement) and BatteryBarn immediately replaced it with a new one for free. Even more impressively, he sent me a new battery in reply to my e-mail, and trusted me to return the defective battery in the postage-paid mailer he included with the new battery! Now THAT is First-Class service!!

I recently purchased a battery charger that came with two Power2000 AAA batteries. Put them in the charger and nothing happened. Put them in another charger and nothing. Put them in a remote to see if maybe they were already charged, nothing. I contacted the seller and he sent me two more batteries and same scenario. I do not think I will buy Power2000 AAA batteries, ever.